[v1.22.x]prov/efa: always use p2p for system memory #10397
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Should you backport all 2 commits in #10392? Same for the other backport |
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I saw the older branches did not have the p2p_available variable so I didn't backport the other commit |
Then you should backport #10347 as well? |
Currently EFA provider doesn't handle the fi_sendmsg call with FI_INJECT flags correctly. It allows user to pass in a buffer with valid MR while doing inject - outbound buffer should be reusable immediately after function returns. That being said, without the inline HW support, EFA provider should do a copy from the user buffer to the internal bounce buffer even if application provides a valid MR for the buffer. Signed-off-by: Jessie Yang <[email protected]> (cherry picked from commit 22be7e0)
fi_writemsg with FI_INJECT needs to copy from outbound buffer to internal bounce buffer. The outbound buffer can be non-system. Extract and call a helper function for device to host copy. Signed-off-by: Jessie Yang <[email protected]> (cherry picked from commit 1b3fb77)
P2P is always available for host memory. Unregistered buffer will be regarded as host memory as EFA provider requires FI_MR_HMEM. Signed-off-by: Jessie Yang <[email protected]> (cherry picked from commit b0af713)
Rename to mr_p2p_available to indicate that we check the mr is not NULL. Signed-off-by: Jessie Yang <[email protected]> (cherry picked from commit 677bdeb)
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shijin-aws
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Sep 18, 2024
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Backport #10347 and #10392